Savings & ROI calculator
Stay with your utility — or switch to solar?
Adjust the inputs to model your 25-year cost. All numbers are estimates. Enter any incentives or rebates manually as a dollar amount.
Monthly electricity bill ($)
Ownership path
Advanced assumptions
Electricity rate ($/kWh)
Annual rate increase (%)
System size (kW) — blank = auto
Installed cost ($/watt)
% of bill offset
Incentives / rebates ($)
Auto-estimated system9.6 kWGross $28,929 · net $28,929
Cumulative costs
UtilitySolar
methodology
How we calculate.
System size auto-estimates as bill ÷ rate ÷ 1,400 kWh/kW/yr.
Utility cost compounds at the rate-increase % you set.
Solar covers your offset %; the residual is paid to the utility.
Cash & loan paths add the system net cost at year 0.
Lease/PPA models a payment roughly 70% of your starting bill, escalating at 2.5%.
